vendor: import KillerPDF 1.7.5 source (GPL-3.0) as the base for MMD PDF

2026-08-27 06:58:22 +02:00
commit 532485a830
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+#region PDFsharp - A .NET library for processing PDF
+//
+// Authors:
+//   Stefan Lange
+//
+// Copyright (c) 2005-2016 empira Software GmbH, Cologne Area (Germany)
+//
+// http://www.PdfSharpCore.com
+// http://sourceforge.net/projects/pdfsharp
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the "Software"),
+// to deal in the Software without restriction, including without limitation
+// the rights to use, copy, modify, merge, publish, distribute, sublicense,
+// and/or sell copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+// DEALINGS IN THE SOFTWARE.
+#endregion
+
+using System;
+using System.Diagnostics;
+using PdfSharpCore.Drawing;
+
+namespace PdfSharpCore.Pdf.Advanced
+{
+    /// <summary>
+    /// Represents a base class for dictionaries with a content stream.
+    /// Implement IContentStream for use with a content writer.
+    /// </summary>
+    public abstract class PdfDictionaryWithContentStream : PdfDictionary, IContentStream
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfDictionaryWithContentStream"/> class.
+        /// </summary>
+        public PdfDictionaryWithContentStream()
+        { }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PdfDictionaryWithContentStream"/> class.
+        /// </summary>
+        /// <param name="document">The document.</param>
+        public PdfDictionaryWithContentStream(PdfDocument document)
+            : base(document)
+        { }
+
+        /// <summary>
+        /// Initializes a new instance from an existing dictionary. Used for object type transformation.
+        /// </summary>
+        protected PdfDictionaryWithContentStream(PdfDictionary dict)
+            : base(dict)
+        { }
+
+        /// <summary>
+        /// Gets the resources dictionary of this dictionary. If no such dictionary exists, it is created.
+        /// </summary>
+        internal PdfResources Resources
+        {
+            get
+            {
+                if (_resources == null)
+                    _resources = (PdfResources)Elements.GetValue(Keys.Resources, VCF.Create);
+                return _resources;
+            }
+        }
+        PdfResources _resources;
+
+        /// <summary>
+        /// Implements the interface because the primary function is internal.
+        /// </summary>
+        PdfResources IContentStream.Resources
+        {
+            get { return Resources; }
+        }
+
+        internal string GetFontName(XFont font, out PdfFont pdfFont)
+        {
+            pdfFont = _document.FontTable.GetFont(font);
+            Debug.Assert(pdfFont != null);
+            string name = Resources.AddFont(pdfFont);
+            return name;
+        }
+
+        string IContentStream.GetFontName(XFont font, out PdfFont pdfFont)
+        {
+            return GetFontName(font, out pdfFont);
+        }
+
+        internal string GetFontName(string idName, byte[] fontData, out PdfFont pdfFont)
+        {
+            pdfFont = _document.FontTable.GetFont(idName, fontData);
+            Debug.Assert(pdfFont != null);
+            string name = Resources.AddFont(pdfFont);
+            return name;
+        }
+
+        string IContentStream.GetFontName(string idName, byte[] fontData, out PdfFont pdfFont)
+        {
+            return GetFontName(idName, fontData, out pdfFont);
+        }
+
+        /// <summary>
+        /// Gets the resource name of the specified image within this dictionary.
+        /// </summary>
+        internal string GetImageName(XImage image)
+        {
+            PdfImage pdfImage = _document.ImageTable.GetImage(image);
+            Debug.Assert(pdfImage != null);
+            string name = Resources.AddImage(pdfImage);
+            return name;
+        }
+
+        /// <summary>
+        /// Implements the interface because the primary function is internal.
+        /// </summary>
+        string IContentStream.GetImageName(XImage image)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <summary>
+        /// Gets the resource name of the specified form within this dictionary.
+        /// </summary>
+        internal string GetFormName(XForm form)
+        {
+            PdfFormXObject pdfForm = _document.FormTable.GetForm(form);
+            Debug.Assert(pdfForm != null);
+            string name = Resources.AddForm(pdfForm);
+            return name;
+        }
+
+        /// <summary>
+        /// Implements the interface because the primary function is internal.
+        /// </summary>
+        string IContentStream.GetFormName(XForm form)
+        {
+            throw new NotImplementedException();
+        }
+
+        /// <summary>
+        /// Predefined keys of this dictionary.
+        /// </summary>
+        public class Keys : PdfDictionary.PdfStream.Keys
+        {
+            /// <summary>
+            /// (Optional but strongly recommended; PDF 1.2) A dictionary specifying any
+            /// resources (such as fonts and images) required by the form XObject.
+            /// </summary>
+            [KeyInfo(KeyType.Dictionary | KeyType.Optional, typeof(PdfResources))]
+            public const string Resources = "/Resources";
+        }
+    }
+}